[填空题]
A projectile is fired frl u n kd3;tm,haxrv ;dgvz3s0c, l+b(-om ground level with an initial spee*ga 0jmw -cdi-d of 55.6 m/s at an angle wja*c 0--gmidof $41.2^{\circ}$ above the horizontal. (a) Determine the time necessary for the projectile to reach its maximum height. $s$ (b) Determine the maximum height reached by the projectile. $m$ (c) Determine the horizontal and vertical components of the velocity vector at the maximum height. horizontal: $m/s$ vertical: $m/s$ (d) Determine the horizontal and vertical components of the acceleration vector at the maximum height. horizontal: $m/s^2$ vertical: $m/s^2$
